RHOTHETA Elektronik
RT-600 Light
Multi-Band Direction Finder System for Airborne SAR
The RHOTHETA direction finder system RT-600 Light is designed to receive and locate emergency signals and special application signals on the international distress and application specific frequencies in the VHF / UHF frequency range. The system consists of an Antenna Unit (AU), which is designed light and robust for typical use on unmanned aircraft.
| Method of bearing: | Doppler principle (3 kHz rotational frequency, right / left rotation) |
|---|---|
| Bearing accuracy: | ±5° RMS1 |
| Internal resolution: | 1° |
| Bearing Sensitivity: | VHF Air/Emergency: ±5° bearing fluctuation ≤ 6 μV/m / 4 μV/m (typical) VHF Marine Band: ±5° bearing fluctuation ≤ 5 μV/m / 2.5 μV/m (typical) LoJack Decoding: ±5° bearing fluctuation ≤ 5 μV/m / 2 μV/m (typical) |
| Frequency stability: | ±2.0 ppm (b,.f/f = ±2 X 10·6) |
| Reception frequencies, SAR version (standard): | VHF Emergency Band: 118.000 to 124.000 MHz (8.33 kHz steps, AM) VHF Marine Band: 154.000 to 163.000 MHz (5.00 kHz steps, FM) UHF Emergency Band: 240.000 to 246.000 MHz (25.00 kHz steps, AM) UHF FM-Band: 406.100 to 410.000 MHz (5.00 kHz steps, FM) COSPAS/SARSAT: 400.000 to 406.092 MHz lncl. 406.022 to 406.076 MHz (Channel A … S) Additional Frequency Options: F1 VHF Air Band: 118.000 to 136.992 MHz (8.33 kHz steps, AM) F2 extended VHF Marine Band: 137.000 to 224.995 MHz (5.00 kHz steps, FM) F3 extended UHF Air Band: 225.000 to 399.975 MHz (25.00 kHz steps, AM) F4 additional UHF FM Band: 406.100 to 470.000 MHz (5.00 kHz steps, FM) |
| Reception frequencies, Law Enforcement version: | VHF Emergency Band: 118.000 to 124.000 MHz (8.33 kHz steps, AM) VHF Marine Band: 154.000 to 163.000 MHz (5.00 kHz steps, FM) LoJack: 164.000 to 174.000 MHz (12.5 kHz steps) ETS: 216.000 to 220.000 MHz (10/12.5 kHz steps, FM) COSPAS/SARSAT: 400.000 to 406.092 MHz lncl. 406.022 to 406.076 MHz (Channel A … S) Additional Frequency Options: Fl VHF Air Band: 118.000 to 136.992 MHz (8.33 kHz steps, AM) F2 extended VHF Marine Band: 137.000 to 163.000 MHz (5.00 kHz steps, FM) |
| COSPAS/SARSAT freq.: | Channels A to S (406.022 to 406.076 MHz) |
| COSPAS/SARSAT Fast scan mode: | Full automatic detection of any active COSPAS/SARSAT channel A to S within 400 ms |
| COSPAS/SARSAT decoding: | Reception and decoding of COSPAS/SARSAT data signal (112 or 144 bit, 400 baud, biphase L encoded, phase modulation, with Bose-Chaudhuri-Hocquenghem errorcorrecting code, specified according to COSPAS/SARSAT C/S T.001 October 1999) |
| LoJack decoding: | Selectable LoJack ID display and selective active filtering |
| Special scanning modes: | Complete maritime ship band scanning within 3 s |
| Bearable modulation: | A3E, F3E, A3X (ELT modulation), Fl D, G2D, COSPAS/SARSAT Bearing largely independent of modulation |
| Polarization: | Vertical |
| Polarization error: | ≤ 5° at 60° field vector rotation |
| Cone of silence: | 30° to the vertical |
| Response time2: | ≤ 50 ms (with sufficient reception field strength) |
| LC-graphic display: | 128 x 64 pixels, supertwist / transflective, extended range of temperature, dark-blue display on yellow-green background, background light. |
| NVG cockpit design: | Freely adjustable (exponential) dimming of brightness |
| Operating voltage: | Fully compatible NVIS Green B display Control Unit optional |
| Current consumption: | LCD-background light “OFF“ : 500 mA at 12 V DC, 250 mA at 24 V DC LCD-background light at 100 %: 750 mA at 12 V DC, 350 mA at 24 V DC Option NVG, LCD-background light at 100 %: 900 mA at 12 V DC, 400 mA at 24 V DC RT-600 Light (AU only): 200 mA at 12 V DC, 100 mA at 24 V DC |
| Audio out: | External speaker 2 W (4 Ω) Maximum output voltage 8 V pp at maximum volume |
| Interface: | Serial interface RS-232 (9600 baud, 8 data bits, 1 stop bit, no parity) Analog dimming input voltage for legends Night/NVG input dimming line for LCD-background light |
| Options: | - NVIS Display - ARING 429 Adapter - Ramp Tester - Antenna light weight version for UAV (RT-600 Light) |
| Display Control Unit (DCU): | Weight: 250 g Operating temperature: -20°C to +60°C Storage temperature: -30°C to +80°C Dimensions: 82 mm x 82 mm x 43 mm |
| Antenna Unit (AU): | Weight: 1,300 g Operating temperature: -40°C to +60°C Storage temperature: -55°C to +80°C Ingress protection: IP 67 Dimensions: Ø 270 mm x 185 mm |
RT-600 Light
Accessories
RAMP Tester
The RT-600 ramp tester is a measuring device that enables a rapid functional test of the RT-600. It consists of the antenna measurement device and an optional RF signal generator, which allows the testing of arbitrary frequencies within the RT-600 frequency range. The ramp tester can be easily attached to the RT-600 AU and allows a functional test in 45 ° increments. It offers a comprehensive performance test of the DF system mounted on the aircraft, including DF accuracy, bearing sensitivity and audiomodulation test.
Frequency options RT-600 A
F1 VHF-Airband: 118.000 bis 136.992 MHz; F2 VHF-Marineband: 137.000 bis 224.995 MHz; F3 UHF-Airband: 225.000 bis 399.975 MHz; F4 UHF-FM Band: 406.100 bis 470.000 MHz
The Optional Frequency extensions can be ordered seperatly to extend the frequency range of each system individually.
RT-600 Light
References
